import java.awt.*;
import java.applet.Applet;

public class EventMonitor extends Applet
{
	final int maxLines = 20;
	TextArea theEvents = new TextArea(maxLines,50);
	Button aButton = new Button("A button");
	int eventCount = 0, lines = 0;
	Button mode = new Button("Show Enter/Exit/+-Focus/keyUp/mouseUp");
	boolean showEntersEtc = false;
	
	private void addLine(String msg) {
		while (lines>=maxLines) {
			theEvents.replaceText("",0,1+theEvents.getText().indexOf('\n')); 
			lines--;
		}
		eventCount++;
		theEvents.appendText(eventCount+": "+msg+"\n"); 
		lines++;
	}
		
	public void init() {
		add(aButton);
		theEvents.setEditable(false);
		add(theEvents);
		add(mode);
		addLine("init");
		repaint();
	}
	
	public void paint( Graphics g ) {
		g.drawRect(bounds().x+1, bounds().y+1, bounds().width-2, bounds().height-2);
		addLine("paint");
	}

	public void start() {
		moveCount = 0;
		dragCount = 0;
		addLine("start");
	}

	public void stop() {
		addLine("stop");
		int i;
		for (i=0; i<10000000; i++);
	}

	public void destroy() {
		addLine("destroy");
		int i;
		for (i=0; i<10000000; i++);
	}

	public boolean mouseEnter(Event e, int x, int y) {
		if (showEntersEtc) {
			moveCount = 0;
			dragCount = 0;
			addLine("("+x+","+y+") mouseEnter into "+e.target.getClass().getName());
		}
		return true; 
	}

	public boolean mouseExit(Event e, int x, int y) {
		if (showEntersEtc) {
			moveCount = 0;
			dragCount = 0;
			addLine("("+x+","+y+") mouseExit from "+e.target.getClass().getName());
		}
		return true; 
	}

	public boolean mouseDown(Event e, int x, int y) {
		moveCount = 0;
		dragCount = 0;
		addLine("("+x+","+y+") mouseDown in "+e.target.getClass().getName());
		return true; 
	}

	public boolean mouseUp(Event e, int x, int y) {
		if (showEntersEtc) {
			moveCount = 0;
			dragCount = 0;
			addLine("("+x+","+y+") mouseUp in "+e.target.getClass().getName());
		}
		return true; 
	}

	int moveCount = 0;
	
	public boolean mouseMove(Event e, int x, int y) {
		if (moveCount==0) addLine("("+x+","+y+") mouseMove in "+e.target.getClass().getName());
		moveCount++;
		if (moveCount==5) moveCount = 0;
		return true; 
	}

	int dragCount = 0;
	
	public boolean mouseDrag(Event e, int x, int y) {
		if (dragCount==0) addLine("("+x+","+y+") mouseDrag in "+e.target.getClass().getName());
		dragCount++;
		if (dragCount==5) dragCount = 0;
		return true; 
	}

	public boolean gotFocus(Event e, Object o) {
		if (showEntersEtc) {
			moveCount = 0;
			dragCount = 0;
			addLine("gotFocus for "+e.target.getClass().getName());
		}
		return true; 
	}

	public boolean lostFocus(Event e, Object o) {
		if (showEntersEtc) {
			moveCount = 0;
			dragCount = 0;
			addLine("lostFocus from "+e.target.getClass().getName());
		}
		return true; 
	}

	public boolean keyDown(Event e, int key) {
		moveCount = 0;
		dragCount = 0;
		addLine("keyDown in "+e.target.getClass().getName());
		return true; 
	}

	public boolean keyUp(Event e, int key) {
		if (showEntersEtc) {
			moveCount = 0;
			dragCount = 0;
			addLine("keyUp in "+e.target.getClass().getName());
		}
		return true; 
	}

	public boolean action(Event e, Object o) {
		moveCount = 0;
		dragCount = 0;
		addLine("action in "+e.target.getClass().getName());
		if (e.target==mode) {
			showEntersEtc = !showEntersEtc;
			if (showEntersEtc)
				mode.setLabel("Ignore Enter/Exit/+-Focus/keyUp/mouseUp");
			else
				mode.setLabel("Show Enter/Exit/+-Focus/keyUp/mouseUp");
		}
		return true; 
	}

	public boolean handleEvent(Event e) {
		if (!super.handleEvent(e)) {
			moveCount = 0;
			dragCount = 0;
			addLine("handleEvent: other event in "+e.target.getClass().getName());
		}
		return true;
	}

}